First of all, probably Benedict’s nest-mate. I’d love for there to be a mission tied into that, too. Where we turn up to rescue her and she ends up pulling our fat out of the fire (likely freeing the players from some utterly ridiculous, obvious trap).
Other than that, I want more robots with more diverse personalities. The sentries have fantastic personalities but we haven’t had one of those yet and it’s a damn shame. I’m not talking about an actually playable sentry as that might be difficult considering their size and how missions are designed around characters that only go as big as Kleese/ISIC. More, then, a reduced sentry or a robot with a sentry personality core.
I’d also love a Varelsi defector with a lot of lore and a mission surrounding them that really gets into what they’re doing and why they’re doing it. To give the Varelsi a history and a reason beyond ‘ooga booga, bad guys.’ ISIC seems to believe that they’re only doing this to our Universe because they’re running scared and balls-to-the-wall deseprate. ISIC’s an intelligent chap, so he’s probably right. I’d love to see that expanded upon.
Perhaps if the Varelsi were a oneness but some catastrophic event has actually driven them towards becoming two separate minds, divided down the middle in regards to whether they should do this to our reality or not. If they should accept their fate and extinction or be willing to wipe out countless other species to preserve themselves.
You could write a really interesting story with that. Hell, bring Grant Morrison on to have him help with the base storyline, he eats, sleeps, and poops this stuff.
So there you go, that’s what I’d like to see.
Something in the DLC chapters, maybe?